Vibrating machine



Patented Oct. 18, 1938 UNITED STATES PATENT OFFICE 2 Claims.

This invention relates to a Vibrating machine or roller of that classused in the construction of concrete highways, streets and areas, andhas for one of its objects to provide a machine of 5 more simple partsthan ordinary.

Another object is to provide a combined vibrator and spreader, saidspreader being of advantage as an aid to rapid work since the plasticmaterial to be packed and pressed by the machine when delivered to aroadbed often has a rough undulating surface, and the spreader breaksdown all hummocks and provides a comparatively level surface in advanceof the rollers to avoid the formation of depressions.

Also the invention includes a new system of operation, whereby the softmaterial may be pressed and leveled uniformly and at lesser expense thanusual, this feature including the use of a flexible covering or carpet,such as wire-cloth upon which the machine may roll. In instances whenthe ingredients at the surface are in free plastic condition thewire-cloth is used and the rollers operate to press the materialdownwardly into the layer of broken rock which forms the base of thepavement and at that time the spreader is not used.

The invention consists of the new and useful construction, combinationand arrangement of parts as described and claimed herein, and asillustrated in the drawing, it being understood that changes may be madein form, size, proportions and minor details, said changes being withinthe scope of the invention as claimed.

In the drawing, Fig. 1 is a View of the machine S5 in side elevation,the handle being broken away.

Fig. 2 is a plan View of the lower part of the machine, the sectionbeing on line 2-2 of Fig. 1.

Fig. 3 is a sectional detail showing one ofthe resiliently mountedplungers.

Referring now to the drawing for a more particular description, numerals4 indicate a pair of parallel rollers, each being provided axially atits ends with a pair of trunnions 5 which are journalled in a pair ofyokes 6, said yokes being connected, in part, by the arms l of thehandle 8, and in part by a spreader-member 9. Also the opposed yokes 6are relatively connected since Washers :c are preferably mounted on thetrunnions, and the yokes together with the parts mentioned provide aframe approximately rectangular in plan of strong construction, adaptedto adequately sustain all stresses while the machine is rolled back andforth for pressing the soft mixture, such as sand, water and cement,downwardly into the lower mass of crushed rock I shown in Fig. l., saidoperation also causing th material to become packed and solidified.

However, in order that depressions will not be for-med by action of therollers while moving on soft surface-material, a flexible covering,preferably of wire-cloth Il is provided, upon which the rollers move,said wire-cloth permitting free movement thereon of the machine butfurnishing suicient resistance to prevent objectionable pockets ordepressions, so that a smooth, uniform surface for a highway may beattained.

in some instances however, the cover l l may be dispensed with,.theseinstances being when the surface ingredients are of lesser liquidconsistency, and also the spreader is used to advantage when theingredients dumped upon the base it! has rough surfaces.

The spreader-member may be adjusted so that it will be maintained atgreater or lesser distances from the ground. The arms I2 of member 9 areswingably mounted on the trunnions of the front roller 4 and may besecured in stationary relation with the yokes 6 by use of keepers I3which may engage in any selected apertures I4 of the yokes.

When it is desired that the spreader-member is not to be used anadjustment may be made to maintain it in non-operative position, thekeepers engaging in the uppermostV apertures.

To provide for vibration of the rollers 4, a gasoline motor l is mountedon a platform I6, said motor being provided with a balance Wheel l1provided on its periphery with a projection I 8 operating as aweight-member to cause the balance to rotate off center from the shaftI9 of the motor. However this abnormal condition or peripheralweight-member I8 and also the Wheel l? in some instances may be omittedif desired for the reason that ordinary vibration is normally producedon account of action of gasoline motors.

ln order that the vibration may be applied effectively to the rollers sothat the soft ingredients will be forced downwardly to iill the spacesbetween and aro-und the pieces of rock forming the base l@ of theconcrete pavement, vertical supports are provided for the platform to bedescribed. At are indicated a plurality of sockets arranged in pairs atthe ends of the rollers and mounted on the yokes in the vertical planesof the axes of said rollers, each socket containing a helical spring 2las shown in Fig. 3. A plurality of plunger-members or stub shafts 22slidably engage in the sockets and are secured to the platform.

since the center of gravity of the platform andy motor thereon isdisposed approximately in vertical alignment With that of thebase-assembly the desired vibration of the element I5 will be directedpractically and uniformly to the rollers.

I claim as my invention- 1. In a machine for the purposes described, abase assembly including a pair of opposed, parallel, relativelyconnected yokes and a pair of parallel cylindrical rollers havingtrunnions journalled in said yokes, a platform disposed above with itscenter of gravity normally in line, vertically, with the center ofgravity of the base assembly, a plurality of upright supporting memberseach resiliently mounted on a yoke at the end of a roller and secured tothe platform, and a gasoline motor on the platform to cause Vibration ofthe supporting-members and yokes to cause vibration of said rollers.

2. In a machine for the purposes described, a pair of opposed, parallelyokes each provided with a pair of socket-members, helical springs inthe socket-members, a pair of parallel cylindrical rollers disposed sideby side and having journalled bearings at their ends in said yokes, ahorizontal platform above the rollers, a plurality of plungermemberssecured to the platform slidably mounted in the socket-members andnormally engaging said springs, and a vibratory motor on the JOHN T.KERNS.

